使用Springboot org.apache.commons.logging禁用PDFBox日志记录

Question

我找不到从psring引导应用程序中使用的PDFBox停止警告的方法。例如：

2019-10-01 16:53:51.021  WARN 24564 --- [nio-8443-exec-2] o.a.pdfbox.pdmodel.font.PDType0Font      : No Unicode mapping for CID+4 (4) in font Calibri-Bold

2019-10-01 16:53:51.022  WARN 24564 --- [nio-8443-exec-2] o.a.pdfbox.pdmodel.font.PDCIDFontType2   : Failed to find a character mapping for 4 in Calibri-Bold

2019-10-01 16:53:51.022  WARN 24564 --- [nio-8443-exec-2] o.a.pdfbox.pdmodel.font.PDCIDFontType2   : Failed to find a character mapping for 4 in Calibri-Bold

我尝试过：在申请文件中：

static {
  System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.NoOpLog");
  java.util.logging.Logger.getLogger("org.apache.pdfbox").setLevel(java.util.logging.Level.OFF);

  String[] loggers = {
    "org.apache.pdfbox.util.PDFStreamEngine",
    "org.apache.pdfbox.pdmodel.font.PDSimpleFont",
    "org.apache.pdfbox.pdmodel.font.PDFont",
    "org.apache.pdfbox.pdmodel.font.FontManager",
    "org.apache.pdfbox.pdfparser.PDFObjectStreamParser",
    "o.a.pdfbox.pdmodel.font.PDCIDFontType2",
    "org.apache.pdfbox.pdmodel.font.PDCIDFontType2",
    "o.a.pdfbox.pdmodel.font.PDType0Font",
    "org.apache.pdfbox.pdmodel.font.PDType0Font",
    "org.apache.pdfbox.pdmodel.font.PDType1Font"
  };
  for (String logger: loggers) {
    org.apache.log4j.Logger logpdfengine = org.apache.log4j.Logger
      .getLogger(logger);
    logpdfengine.setLevel(org.apache.log4j.Level.OFF);
  }

}

作为运行jar时的参数：

-Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.NoOpLog
-Dorg.slf4j.simpleLogger.defaultLogLevel=off

在PDFBox代码中，使用以下命令设置日志：

(import org.apache.commons.logging.LogFactory;)

private static final Log LOG = LogFactory.getLog(PDCIDFontType0.class);

LOG.warn("Found PFB but expected embedded CFF font " + fd.getFontName());

我花了很长时间尝试很多事情，并在类似的问题中浏览了答案，但是却一无所获。

Answer 1

这是我在“旧” log4j log4j.properties文件中使用的（您应该迁移到log4j2）：

log4j.logger.org.springframework=WARN
log4j.logger.org.apache.pdfbox.pdmodel.font.PDCIDFontType2=FATAL

在“新” log4j2.xml中，我有这个（附加程序分别命名为STDOUT和A1）：

<?xml version="1.0" encoding="UTF-8"?>
<!-- https://logging.apache.org/log4j/2.x/manual/configuration.html 
     https://logging.apache.org/log4j/2.x/manual/appenders.html
-->
<Configuration>
    <Appenders>
        ....
        ....
    </Appenders>
    <Loggers>
        <Logger name="org.springframework" level="warn" additivity="false">
            <AppenderRef ref="STDOUT"/>
            <AppenderRef ref="A1"/>
        </Logger>
        <Logger name="org.apache.pdfbox.pdmodel.font.PDCIDFontType2" level="fatal" additivity="false">
            <AppenderRef ref="STDOUT"/>
            <AppenderRef ref="A1"/>
        </Logger>
        <Root level="info">
            <AppenderRef ref="STDOUT"/>
            <AppenderRef ref="A1"/>
        </Root>
    </Loggers>
</Configuration>

Answer 2

这是我最终使用的配置文件。我没有包括任何与日志记录相关的依赖项，也没有向pdfbox依赖项添加任何排除项，只是将此文件添加到了包含application.properties文件的文件夹中。

文件名是logback-spring.xml

<property name="LOGS" value="./logs" />

<appender name="Console"
    class="ch.qos.logback.core.ConsoleAppender">
    <layout class="ch.qos.logback.classic.PatternLayout">
        <Pattern>
            %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable
        </Pattern>
    </layout>
</appender>

<appender name="RollingFile"
    class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${LOGS}/spring-boot-logger.log</file>
    <encoder
        class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
        <Pattern>%d %p %C{1.} [%t] %m%n</Pattern>
    </encoder>

    <rollingPolicy
        class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <!-- rollover daily and when the file reaches 10 MegaBytes -->
        <fileNamePattern>${LOGS}/archived/spring-boot-logger-%d{yyyy-MM-dd}.%i.log
        </fileNamePattern>
        <timeBasedFileNamingAndTriggeringPolicy
            class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
            <maxFileSize>10MB</maxFileSize>
        </timeBasedFileNamingAndTriggeringPolicy>
    </rollingPolicy>
</appender>

<!-- LOG everything at INFO level -->
<root level="info">
    <appender-ref ref="RollingFile" />
    <appender-ref ref="Console" />
</root>

<!-- LOG "com.baeldung*" at TRACE level -->
<logger name="org.apache" level="ERROR" additivity="false">
    <appender-ref ref="RollingFile" />
    <appender-ref ref="Console" />
</logger>

<logger name="flooding logger" level="ERROR" additivity="false">
  <appender-ref ref="Console"/>